1086 A MONOGRAPH OF THE AUSTRALIAN SPONGES, 



The only specimen is a Soleniscus with 0-3 — 0-8 broad persons. 

 The Pseudopores have a diameter of 0-28. The clumsy colony 

 which is 30 mm. in length is sessile on a 2 mm. long peduncle^ 

 The Oscula ai-e slightly larger than the pores in the reticulation. 



Regular spicules with cylindrical, rounded rays, which are 0'18 

 long and O-Ql thick. The irregular dermal spicules are of the 

 same size as the above, but with paired angles and generally in 

 such a way irregular, that their rays are not situated in one plane. 

 The paired rays which inclose the unpaired angles are slightly 

 curved, convex towards each other. 



Besides these there are a few I'egular spicules with rays 8 mm. 

 long. 



Colour : Yellowish. 



Locality : North Coast of Australia, Cape York (Challenger.) 



5. SPECIES. ASCETTA PROCUMBENS. Nov. spec. 



The sponge consists of numerous slightly curved cylindrical 

 tubes, extending in one plane, in one or more layei's. The sponge has 

 the appearance of a perforated plate, and attains a diameter of 25 

 and a thickness of 2'5 mm. 



The spicules are regular. The rays are O'l mm. long and at the 

 base 0-015 thick. The rays are pretty stout, conic and slightly 

 rounded at the ends. Our species is distinguished from the 

 allied species by the rays of its spicules being neither cyliiadrical 

 as in Ascetta coriacea nor pointed as in the numerous varieties of 

 Ascetta primordialis. Besides that, the spicules are shorter than 

 in the latter and thicker than in the former. 



Locality : East coast of Australia (Port Jackson.) South coast 

 of Australia (Port Phillip), von Lendenfeld. 



6. SPECIES. ASCETTA MACI.EAYI. Nov. spec. 



Triradiate spicules forming low triangular pyramids with equal 



angles. One ray always longitudinally situated, longer than the 



other two and pointing towards the aboi'al pole. Longitudinal 



ray 0-05 (Pseudo-osculum) — 0-1 (body and peduncle) x 0-003 — 



